You don't need to have legs to be a Master Builder! With the help of her creative imagination, the Mermaid Queen has assembled an entire underwater realm for herself and her mermaid pals. Brick by brick, she builds colorful coral reefs, fields of waving seaweed, and an almost endless variety of fish and other sea life.

But not even the deep brick sea is safe from Lord Business's wicked plan. Now she is in hiding like her fellow Master Builders, waiting for the signal to gather and unite behind the prophesied hero known only as the Special!